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https://issues.apache.org/jira/browse/FLINK-28597?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Roman Khachatryan closed FLINK-28597.
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> Empty checkpoint folders not deleted on job cancellation if their shared
> state is still in use
> ----------------------------------------------------------------------------------------------
>
> Key: FLINK-28597
> URL: https://issues.apache.org/jira/browse/FLINK-28597
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Checkpointing
> Affects Versions: 1.16.0
> Reporter: Roman Khachatryan
> Assignee: Roman Khachatryan
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.16.0
>
>
> After FLINK-25872, SharedStateRegistry registers all state handles, including
> private ones.
> Once the state isn't use AND the checkpoint is subsumed, it will actually be
> discarded.
> This is done to prevent premature deletion when recovering in CLAIM mode:
> 1. RocksDB native savepoint folder (shared state is stored in chk-xx folder
> so it might fail the deletion)
> 2. Initial non-changelog checkpoint when switching to changelog-based
> checkpoints (private state of the initial checkpoint might be included into
> later checkpoints and its deletion would invalidate them)
> Additionally, checkpoint folders are not deleted for a longer time which
> might be confusing.
> In case of a crash, more folders will remain.
> cc: [~Yanfei Lei], [~ym]
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